Winding machine for cross wound bobbin



Sept. 16, 1969 J. RUF 3,467,326

WINDING MACHINE FOR CROSS WOUND BOBBIN Filed March 6, 1967 4 Sheets-Sheet 1 Sept. 16, 1969 J. uF 3,467,325

WINDING MACHINE FOR CROSS WOUND BOBBIN Filed March 6, 1967 4 Sheets-Sheet 2 Sept. 16, 1969 J. RUF 3,467,326

WINDING MACHINE FOR CROSS WOUND BOBBIN Filed March a, 1967 4 Sh eets-Sheet s I w 6 5, I?

I g i Sept. 16, 1969 .1. RU F 3,467,326

WINDING MACHINE FOR CROSS WOUND BOBBIN Filed March 6, 1967 4 Sheets-Sheet L United States Patent 3,467,326 WINDING MACHINE FOR CROSS WOUND BOBBIN Josef Ruf, Memmingerberg, Germany, assignor to Maschinenfabrik Memmingen Ing. Theodor Otto, Memmingen, Germany Filed Mar. 6, 1967, Ser. No. 621,030 Claims priority, application Germany, Mar. 30,1966,

68,975 Int. Cl. B65h 53/08, 53/00 US. Cl. 24243 4 Claims ABSTRACT OF THE DISCLOSURE The invention relates to a winding machine for a cross wound bobbin comprising a bobbin-bearing and driving shaft and a yarn-guiding system moved by a transmission.

Winding machines are known in which a yarn guide reciprocates along the outside of the winding. The yarn guide is driven by a transmission which can be changed over or varied to suit the particular kind of winding required. The yarn guide must be adapted to the yarn thickness, i.e., it must be charged when the yarn thickness changes.

The yarn for a cross wound bobbin is of course wound helically. If a helical winding is to proceed rapidly, the yarn guide or yarn carrier must be guided along the outside of the winding at an appropriately rapid rate; similarly, the yarn carrier must reverse very rapidly at both ends of its travel. The yarn carrier of the known winders must therefore reciprocate rapidly, so that the output is limited. More particularly, since the yarn carrier movements are not performed harmonically, considerable forces of acceleration and deceleration are produced, and the machine runs unevenly and makes considerable noise.

It is an object of the invention to provide a winding machine for a cross wound bobbin which overcomes the disadvantages of the known machines, with particular emphasis on the output being independent of the manner in which the yarn carrier is driven.

Generally, the invention provides a winding machine for a cross wound bobbin including a bobbin, a bobbinbearing and driving shaft, a yarn-guiding means for reciprocating the yarn on the outside of the bobbin substantially parallel to the axis thereof and delivering the yarn to the bobbin and a transmission for moving the yarn-guiding means, the yarn-guiding means comprising a rotatable cylindrical two-part casing extending about the bobbin and positioned parallel to the axis of the bobbin, said casing parts having facing edges arranged to define a ring slot for guiding yarn from a supply source onto the bobbin and the axial extent thereof corresponding to the bobbin width, and a sensing roller located within the casing for contacting the winding so that as the casing rotates, the yarn reciprocates in the slot with the sensing roller preventing the slot from entraining the yarn as it rotates but allowing displacement of the yarn parallel to the bobbin axis.

The invention therefore replaces the known loop-like yarn carrier by a two-part casing, with the slot between the two casing parts serving to guide the yarn. The yarn is reciprocated as the casing rotates, and the annular slot between the two casing parts can be shaped to provide the required guidance of the yarn.

The main advantage of the machine according to the invention is that it has no reciprocating parts. Only the yarn reciprocates. The yarn-guiding elements rotate uniformly, and the transmission by which the casing is driven is correspondingly simple.

The output is very high since it is no longer limited by the constructional elements of the machine, with the only limit being the strength of the yarn which it is required to wind. Another advantage of the machine is that the place where the yarn contacts the annular slot changes continuously as the casing rotates, so that the wear is spread over a relatively large area and is reduced very considerably. In the known loop-like yarn carrier, on the other hand, the yarn soon cuts itself a groove, with the result that the yarn carrier needs frequent replacement. Another advantage of the invention is that the same casing can be used for yarns of various thickness. All that need be done to this end, as the invention also proposes, is for the axial distance between the two casing parts to be variable to enable the annular slot to be adapted to the yarn thickness. In the known yarnguiding systems, on the other hand, a change in the yarn thickness means changing the yarn carrier.

According to another feature of the invention, the guide elements for the yarn are provided near the casing surface, thus inhibiting entrainment of the yarn by the rotating casing, but permitting displacement of the yarn parallel to the bobbin axis. More particularly, the two casing parts are interconnected via a transmission.

Preferably, the casing extends around the bobbin. Theoretically, the casing can, if required, be placed parallel to and adjacent the bobbin, in which event the yarn must be introduced along the casing axis and fed through the annular slot from the casing and on to the bobbin. However, the embodiment in which the casing extends around the winding is preferably as helping to make the machine more compact.

Conveniently, not only is the spacing between the two casing parts variable to the extent necessary to cover the various thickness of the yarns to be dealt with, but also one casing part can be moved relatively far away from the other casing part, for improved access to the winding inside the casing. According to the invention, therefore, one casing part is mounted on the machine frame and the other casing part bears on the machine frame via a slide or carriage.

Preferably, the transmission interconnecting the two casing parts comprises two gear box parts and a drive shaft disposed therein, with the gearbox and the driveshaft being adapted to be pulled out telescopically but being secured against rotation relatively to one another. According to other features of the invention, the transmission for interconnecting the two casing parts is disposed outside the casing parallel to the axis thereof. Also, the casing is adapted to pivot around a pivot disposed parallel to its axis, and more particularly around the axis of the transmision interconnecting its two parts, so that the yarn-guiding system according to the invention can always be placed very near the winding being wound. The guide elements co-operating with the annular slot comprise one or more rollers disposed parallel to the axis; conveniently in this case, a sensing roller which contacts the winding is provided in the casing, with such roller then determining the position of the casing and associated transmission part during a winding operation.

In known winders the winding being wound is overhung; conveniently. However, according to the invention a support for the bobbin is disposed more particularly on the slide. This support, which is withdrawn together with one casing part at the winding changing, makes it possible to increase the diameter of the cardboard bobbin of the winding without weakening the guide and without weakening the drive of the bobbin, so that the bobbin capacity can be increased.

More particularly, the casing parts of the winder according to the invention are mounted one each in a gearbox which extends around the casing ends, and a step lessly variable transmission is provided in the casing drive, with the same preferably being derived from the bobbin drive.

An embodiment of the invention is diagrammatically illustrated in the drawings wherein:

FIG. 1 is a view partly in front elevation and partly in section of the winder according to the invention;

FIGS. 2 and 3 are two fragmentary views in side elevation of the winder shown in FIG. 1, and

FIGS. 4 and 5 are enlarged fragmentary views in longitudinal section of details of the winder according to the invention.

A gearbox 2 is mounted on a machine frame 1, and a support arm 3 for the mounting of a yarn feed roller 4 is provided on the gearbox 2. The same bears a driving motor 13, shown in dot-dash lines, and receives a driveshaft 12, pulley 14, belt 36 and driven pulley 37.

The diameter of the pulley 37 is adjustable through the agency of an adjusting wheel 38, so that the speed of the pulley 37 can be varied steplessly. The shaft 12 extends through the gearbox 2 and bears a bobbin which is not shown in any great detail and has a known form and is disposed in a casing formed by parts 8 and 31. As can be seen in FIG. 2, the bobbin has a shaft 56.

Part 5 of the box or casing of the interconnecting transmission is mounted with the interposition of ball bearings 6 on gearbox 2 and is substantially unitary with gearbox 7 for the mounting of one part 8 of the bobbin casing. The part 7 receives a ball mount 9 on which the casing part 8 is mounted rotatably. The casing end supported by the ball mount 9 which has the reference 30, is rigidly connected to the casing part 8 and also bears a toothed ring 11. The common center axis of the part 8, ball mount 9, ring 11 and end is denoted 10.

The part 5 has a tubular extension 26 engaged by another tubular extension 25 unitary with a gearbox part 21. There is a splined connection 22 between the extensions 25 and 26, so that the parts 21, 5 can be pulled apart from one another but cannot rotate relatively to one another.

Part 21 bears via a bearing 23 on a slide or carriage 24 engaging by way of skids or the like 18 in a slideway 19 disposed in sidewalls 20 of a top mounting on the frame 1. A support 17 (see FIG. 5) is rigidly connected with the slide 24 and carries a bearing 16 for a support 15 for the bobbin.

The support 15 is guided in and carried by the bushing 16. The support 15 can be unitary with the shaft 12; alternatively, the shaft 12 and the bearing 15 can be stub shafts between which the bobbin is interposed. It will be appreciated that the bushing 16 is provided with a rotary bearing for the support 15 so that the bobbin which is driven from the opposite end via shaft 12 and pulley 14 can bear on the support 15.

Mounted on top of the slide 24 is a securing element 47 (see FIG. 1) which is not shown in greater detail in FIG. 5 and which bears a rod 48 having an actuating grip 49.

Gearbox part 28 is connected to gearbox part 21 in the same way as gearbox part 7 for easing part 8 is connected to gearbox part 5. Part 28 receives ball bearing 27 with shaft end 29 and toothed ring and serves for the mounting of the bobbin casing part 31.

Sleeve 39 on which the pulley 37 is secured has a pinion 41 for driving the toothed ring 11 and is mounted in bearings 40 in the gearbox 5. Sleeve 39 drives shaft 42 via a spline connection 43; shaft 42 is mounted with the interposition of bearings 44 in the gearbox part 21 and has, at the end at which it is thus mounted, a pinion 45 which drives the toothed ring 35. The spline connection 43 has the same function as the spline connection 22, so that, by operation of the grip 49, the gearbox 21 with part 28 can be pulled away from the other part 5 or 7, with the distance between the two casing parts 8, 31 altering. A cover 46 closes gearbox part 21.

As the foregoing shows, the two casing parts 8, 31 are driven similarly and are similarly pivotable together around the axis of the ball bearings 23, 6.

The casing parts 8, 31 are disposed at such a distance from one another that a yarn-guiding slot 34 is left therebetween, and the slot 34 is bounded by edges 32 and 33 of the casing parts. Yarn 53 which is introduced through the slot 34 into the interior of the casing is also guided by guide rollers 50, 52 mounted in the gearbox parts 7, 28. The roller 52 is a sensing roller essentially of the same design as the roller 50. While the roller 50 is disposed outside of the casing, the roller 52 is inside the casing. The ends of the sensing roller 52 are held by elements 51 (FIGS. 2 and 3).

The mobility of the slide or carriage 24 with the respective units is efficacious respecting the exchange of the wound bobbin. By moving the slide to the left (FIG. 1), access may be readily had to the bobbin. In addition, the distance of the casing parts, that is, the size of the slot, can also be adapted to the particular requirements. This is of material importance when yarns of different thickness are to be processed on the same machine.

The support of the rollers 50, 52 on both sides does not prevent this adaptation and it is to be noted that the rollers 50, 52 do not require a separate drive. The rollers are driven by the yarn to be wound. One of the ends of the rollers 50, 52 can be displaced axially in the housing to effect the desired results.

Operation of the winder according to the invention is readily apparent from the foregoing. The winding bobbin draws the yarn 53 from a ball 54 on a plate 55. As the casing formed by the parts 8 and 31 rotates, the yarn reciprocates in the slot 34 in a manner determined by the pattern thereof, and the rollers 50, 52 prevent the slot 34 from entraining the yarn as it rotates. At the start of winding, the casing 8, 31 and associated facilities are in the position shown in FIG. 3. In just the same way as the winding on the bobbin becomes thicker, the sensing roller 52 urges the casing and associated parts into the position shown in FIG. 2. For threading and bobbin changing, the casing part 31 and associated elements can be pulled off to the left in FIG. 1; similarly, the slide system enables the width of the slot 34 to be adapted to yarn thickness.

This invention is not to be confined to any strict conformity to the showings in the drawings but changes or modifications may be made therein so long as such changes or modifications mark no material departure from the spirit and scope of the appended claims.

I claim:

1. In a Winding machine for a cross wound bobbin of the type including a frame, a bobbin, a bobbin-bearing and driving shaft, a yarn-guiding means for reciprocating the yarn on the outside of the bobbin substantially parallel to the axis thereof and for delivering the yarn to the bobbin, and a transmission for moving the yam-guiding means, said yarn-guiding means comprising a rotatable cylindrical two-part casing, said casing enclosing the bobbin and positioned parallel to the axis of the bobbin, said casing parts having facing edges arranged to define a ring slot for guiding yarn from a supply source onto the bobbin and the axial extent thereof corresponding to the width of the bobbin, a displaceable slide bearing on said frame, means mounting one of said casing parts on said frame, means mounting the other casing part on said slide, whereby displacement of the slide in one direction moves said other casing part away from said one casing part to permit access to the bobbin as well as to vary the size of the slot defined by the facing edges of said casing parts, and a sensing roller located within the bobbin for contacting the winding so that as the casing rotates, the yarn reciprocates in the slot and the sensing roller prevents the slot from entraining the yarn as it rotates but allows displacement of the yarn parallel to the axis of the bobbin.

2. The winding machine for a cross wound bobbin as claimed in claim 1 including transmission means interconnecting said two casing parts, said transmission interconnecting means including two gear box components and a drive shaft disposed therein and said gear box components and drive shaft being telescopically arranged for axial removal and being secured against rotation relative to one another.

3. The winding machine for a cross wound bobbin as claimed in claim 2 including means pivotally mounting said casing for movement about a pivot positioned parallel to its axis.

4. The winding machine for a cross wound bobbin as claimed in claim 1 including a support for the bobbin positioned on said slide.

References Cited STANLEY N. GILREATH, Primary Examiner US. Cl. X.R. 

